Cal-Royal CR3300 Carpet Thresh...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$22.33
Cal-Royal Cal-Royal CR3300 Carpet Threshold Series CR3300

Cal-Royal CR3300 Carpet Threshold Series with 3-Hr Positive Pressure Fire Rating

(No reviews yet) Write a Review

Model: CR336136-ALUM
$22.33
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$22.33
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Cal-Royal CR3300 Carpet Threshold Series with 3-Hr Positive Pressure Fire Rating

The Cal-Royal CR3300 Carpet Threshold Series is engineered for commercial door openings requiring a durable, code-compliant transition over carpet flooring. Built heavy duty for high-traffic commercial applications, this threshold series is Handicap Accessible and Barrier Free over carpet, carries a 3-Hr Positive Pressure fire rating, and meets UL 10B, UL 10C, and UBC 7-2 (1997) standards. Available in Aluminum and Dark Bronze finishes, the CR3300 Series delivers both compliance and long-term performance for demanding commercial door installations.

Key Features

  • Barrier-Free Accessibility: Handicap Accessible, Barrier Free design over carpet ensures smooth, compliant transitions for ADA-oriented commercial doorways.
  • Fire Protection Rating: 3-Hr Positive Pressure rating provides reliable performance in fire-rated door assemblies.
  • Code Compliance: Meets UL 10B, UL 10C and UBC 7-2 (1997) standards for verified life-safety performance in commercial construction.
  • Heavy-Duty Construction: Built for durability in high-traffic commercial door openings, supporting long-term reliable operation.
  • Finish Options: Available in Aluminum and Dark Bronze finishes to coordinate with a range of commercial door and frame aesthetics.
  • Fastener System: Supplied with #10 x 1-1/2" wood screws; other screw types and anchors available upon request for varied substrate requirements.
  • Finish-Matched Hardware: MIL finish thresholds include zinc plated screws, brass thresholds include brass screws, color anodized thresholds include matching plated screws, and stainless steel thresholds include stainless steel screws for consistent finish integrity.
  • Non-Slip Option: Available with Sure Step Non-Slip Abrasive Coating for enhanced traction and slip-resistance in commercial traffic areas.
  • Compatible Models: Available in CR3361 and CR33641 configurations, each with dedicated manufacturer installation instructions for accurate field installation.

Certifications & Compliance

  • 3-Hr Positive Pressure Fire Rating
  • UL 10B Listed
  • UL 10C Listed
  • UBC 7-2 (1997) Compliant
  • Handicap Accessible / Barrier Free over carpet

Technical Specifications

  • Product Group: Door Trim and Accessories
  • Product Subgroup: Door Thresholds
  • Product Type: Carpet and Tile Dividers
  • Commercial/Residential: Commercial
  • Product Model: CR3361, CR33641
  • Product Category: Door Trim and Accessories
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Cal-Royal CR3300?

Cal-Royal CR3300 carpet thresholds deliver dependable, code-compliant performance backed by heavy-duty construction and recognized fire and accessibility standards including UL 10B, UL 10C, UBC 7-2 (1997), and 3-Hr Positive Pressure ratings. Engineered for demanding commercial door openings, the CR3300 Series provides a durable, barrier-free transition solution suited to high-traffic environments where compliance and long-term reliability are essential.

Product Specs

Subcategory:
Thresholds
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Thresholds
Product Type:
Carpet and Tile Dividers
Commercial/Residential:
Commercial
Product Model:
CR3361, CR33641
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Cal-Royal CR336136-ALUM – Frequently Asked Questions

1) Can I use the Cal-Royal CR3300 carpet threshold on a fire rated door opening?
Yes. The CR3300 Series carries a 3-Hr Positive Pressure fire rating and is UL 10B and UL 10C listed, and meets UBC 7-2 (1997). That covers it for use in fire-rated door assemblies up to a 3-hour rating, which is what an institutional or healthcare facility inspector will be looking for on a stair or corridor opening.
2) Is a 7/16 inch high threshold going to be a trip hazard or an ADA problem?
No. At 7/16 inch, the CR3300 carpet divider is described as Handicap Accessible and Barrier Free over carpet, so it is intended to give a compliant transition rather than a raised lip. That is the reason to use a carpet divider here instead of a tall saddle threshold, which would stand proud of the finished floor.
3) What lengths does the Cal-Royal CR3300 carpet threshold come in, and which one do I need for a double door?
Stock lengths are 36, 48, 72 and 96 inches, in both profiles. A 36 inch piece covers a standard 3-0 single door. For a pair of 3-0 doors you are at roughly 72 inches of opening, so take the 72 inch length, or the 96 inch if the frame is wider or you want to run the divider past the jambs. Cut to length in the field.
4) What screws come with the Cal-Royal CR3300 threshold, and will they work in a concrete slab?
It ships with #10 x 1-1/2 inch wood screws, which are fine into a wood subfloor. Over a concrete slab you will want anchors instead, and Cal-Royal offers other screw types and anchors on request. Screw finish is matched to the threshold: MIL finish gets zinc plated screws, color anodized gets matching plated screws, brass gets brass, stainless gets stainless.
5) What finishes does the Cal-Royal CR3300 carpet threshold come in, and will Duronodic match my dark bronze frames?
Two finishes are offered on every model and length: Aluminum (mill) and Duronodic, the dark bronze anodized finish. Duronodic is the one to specify against dark bronze doors and frames; aluminum suits clear anodized or mill aluminum openings. Both profiles, CR3361 and CR33641, are available in either, in all four lengths.
6) Can I get the Cal-Royal carpet threshold with a non-slip surface for a wet entry area?
Yes, the CR3300 Series is available with Sure Step Non-Slip Abrasive Coating. Worth specifying at a building entrance, a locker or shower corridor, or anywhere a facility sees tracked-in water, since a bare aluminum divider gets slick underfoot.
How fast can I get the Cal-Royal CR336136-ALUM delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Cal-Royal CR336136-ALUM come with a warranty?
Absolutely. The Cal-Royal CR336136-ALUM is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Cal-Royal CR336136-ALUM?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Cal-Royal CR336136-ALUM from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!